EP3252750B1 - Display device and method for compensating pixels of display device - Google Patents

Display device and method for compensating pixels of display device Download PDF

Info

Publication number
EP3252750B1
EP3252750B1 EP16206613.8A EP16206613A EP3252750B1 EP 3252750 B1 EP3252750 B1 EP 3252750B1 EP 16206613 A EP16206613 A EP 16206613A EP 3252750 B1 EP3252750 B1 EP 3252750B1
Authority
EP
European Patent Office
Prior art keywords
data
compensation
degraded region
pixel
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16206613.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3252750A1 (en
Inventor
Jinyoung Oh
Yeonshim Shim
Jihoon Park
Jeisung Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Display Co Ltd
Original Assignee
LG Display Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Display Co Ltd filed Critical LG Display Co Ltd
Publication of EP3252750A1 publication Critical patent/EP3252750A1/en
Application granted granted Critical
Publication of EP3252750B1 publication Critical patent/EP3252750B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0828—Several active elements per pixel in active matrix panels forming a digital to analog [D/A] conversion circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0613—The adjustment depending on the type of the information to be displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving

Definitions

  • the present disclosure relates to a display device and a method of driving the display device.
  • flat panel displays include a liquid crystal display, a field emission display, a plasma display panel, an organic light-emitting diode (OLED) display, and the like.
  • an OLED used in the OLED display has high luminance and low operating voltage characteristics. Since an OLED display is self-luminous, it has a high contrast ratio. Further, it is easy to implement an ultra-thin display with an OLED display. In addition, the OLED has a response time of several micro seconds (us) and thus is suitable for representing moving images. Further, it has a wide viewing angle and can be driven stably even at a low temperature.
  • Pixels each including an OLED are arranged in a matrix in the OLED display.
  • a data voltage corresponding to image data is applied to each of the pixels to flow a driving current at the OLED so that the OLED emits light at a desired luminance.
  • luminance of each of the pixels is uniform when an OLED display is driven.
  • luminance among the pixels may become non-uniform due to deviations in electrical characteristic among driving transistors each in the respective pixels, deviations in cell driving voltages among the pixels, deviations in deterioration among the OLEDs each in the respective pixels, etc.
  • compensation data is determined according to a cumulative amount of image data, the image data is compensated using the determined compensation data, the compensated image data is converted into a data voltage, and the data voltage is applied to a pixel.
  • FIG. 1 is a diagram illustrating a configuration of a conventional degradation compensation module 10.
  • the conventional degradation compensation module 10 includes an image alignment unit 11, a memory 12, a look-up table 13, and a degradation compensation unit 14.
  • the image alignment unit 11 corresponds and outputs image data DATA converted from an image signal to a size and a resolution of the display panel.
  • the memory 12 stores a cumulative amount of data per each pixel in which the image data DATA applied to each pixel is accumulated at every frame.
  • the look-up table 13 stores an average cumulative amount of data of the cumulative amount of data and compensation data corresponding to a cumulative driving time, which are mapped to each other.
  • the degradation compensation unit 14 reads out a decreased amount of luminance according to the cumulative amount of data per each pixel from the look-up table 13 with reference to the look-up table 13 and the memory 12.
  • the degradation compensation unit 14 reads out compensation data Cdata according to the decreased amount of luminance per each pixel from the look-up table 13, and outputs compensated image data DATA' by adding the compensation data Cdata to the image data DATA to each pixel. Thereafter, a data voltage corresponding to the compensated image data DATA' is applied to each pixel so that each pixel emits light with its target luminance.
  • FIG. 2 is a graph illustrating luminance of a pixel L1 before the image data is compensated, the compensation data Cdata for compensating the image data, and luminance of a pixel L2 after the image data is compensated.
  • a luminance difference of c is generated.
  • an image streaking phenomenon may be generated at a boundary between the pixel section AR2 in which degradation occurs and the pixel sections AR1 and AR3 in which degradation does not occur.
  • the degradation compensation unit 14 sets the compensation data Cdata to b according to the decreased amount of luminance b of the pixel section AR2 in which degradation occurs with reference to the look-up table 13 and the memory 12. Thereafter, the degradation compensation unit 14 adds the set compensation data Cdata b to the image data DATA that is to be displayed at the pixel section AR2 in which degradation occurs, thereby outputting the compensated image data DATA'.
  • the compensated image data DATA' is input to the pixel section AR2 in which degradation occurs so that the luminance L2 of the pixel section AR2 in which degradation occurs after the compensation is increased from a to c that is the difference in luminance before the compensation.
  • the luminance L2 of the pixel section AR2 in which degradation occurs after the image data is compensated is the same the luminance L2 b of each of the pixel sections AR1 and AR3 in which degradation does not occur, such that there may be no luminance difference between the pixel section AR2 in which degradation occurs and the pixel sections AR1 and AR3 in which degradation does not occur.
  • an amount of current corresponding to the compensation data Cdata flows continuously and additionally in a pixel in which degradation occurs. Because an amount of current flowing in the pixel in which degradation occurs is increased, degradation of the pixel may be accelerated as the conventional degradation compensation method is continuously performed.
  • US 2010/007656A1 describes a degradation characteristic acquisition circuit which acquires degradation characteristics of a pixel region, and a boundary portion detection circuit which detects a boundary of the degradation characteristics.
  • a correction amount operation circuit arithmetically operates a correction amount based on the boundary, and a video signal correction circuit corrects a video signal.
  • the correction amount is determined based on the boundary of the degradation characteristics such that emission luminance is gently varied in a periphery of a boundary of a pixel due to the burn-in phenomenon.
  • US 2016/086537 A1 describes an organic light-emitting display comprising: a display panel which comprises a plurality of pixels, each of the pixels having an organic light-emitting diode (OLED); a sensor configured to detect degradation data indicating a degree of degradation of the OLED of each of the pixels and configured to calculate a degradation data difference between two or more adjacent pixels among the pixels; and a controller configured to set a compensation area utilizing the degradation data difference and configured to generate compensated image data by compensating in the compensation area in input image data.
  • OLED organic light-emitting diode
  • US 2014/0160142 Al describes an organic light emitting display which includes a display panel including a plurality of pixels, a compensation area setting unit for selecting an additional compensation requirement area, that is more excessively degraded than an average degradation, based on degradation detection data indicating a degradation degree of organic light emitting diodes formed in the pixels.
  • US 2010/103198 Al describes a method and apparatus for correcting burn-in in a flat screen display.
  • the present disclosure is directed to a display device and a method of driving a display device.
  • An advantage of the present disclosure is to provide a display device that is capable of decreasing final compensation data of pixels included in a degraded region, and reducing a degradation degree of the pixels included in a degraded region and also preventing a lowering of image quality due to degradation by increasing final compensation data of pixels included in an adjacent degraded region.
  • degradation of pixels on which compensation is performed may be accelerated as performing compensation by adding compensation data for compensating degradation to only the pixels at which degradation occurs to drive the pixels.
  • a lowering of image quality due to degradation may be prevented and also a degradation degree of the pixels included in the degraded region may be reduced, thereby extending a lifetime of the display device.
  • final compensation data of the pixels included in the degraded region is decreased and final compensation data of the pixels included in the adjacent degraded region is increased so that a lowering of image quality due to degradation may be prevented and also a degradation degree of the pixels included in the degraded region may be reduced, thereby extending a lifetime of the display device.
  • a degraded region which is easily perceived by a user, is detected on the basis of a deviation between degradation data of pixels and compensation is performed on the degraded region that is detected so that it may be possible to more effectively compensate for degradation.
  • whether correction is performed on compensation data of pixels is determined on the basis of an image characteristic constant generated from input image data so that compensation may be effectively performed as necessary.
  • FIG. 3 is a diagram schematically illustrating a configuration of a display device 1000 according to one embodiment of the present disclosure.
  • the display device 1000 may be configured to include a display panel 100, a data driving unit 200, a gate driving unit 300, a timing control unit 400, and a pixel compensation module 500.
  • the display panel 100 includes pixels P, each of which is configured with an OLED, and a reference voltage line RL is formed at unit pixels P', each of which is formed with at least three pixels P, and connected to the data driving unit 200.
  • signal lines are formed at the display panel 100 to define a pixel region in which the pixels P are formed and to control driving of the pixels P.
  • Such signal lines may be configured to include first to g th (herein, g is a natural number) gate lines GL1 to GLg, first to g th sensing lines SL1 to SLg, first to d th (herein, d is a natural number greater than g) data lines DL1 to DLd, first to d /4 th reference voltage lines RL1 to RL( d /4), a plurality of high potential driving voltage lines HPL1 to HPLd, and at least one low potential driving voltage lines LPL1 to LPLd.
  • a single unit pixel P' is configured with three or four pixels P.
  • four pixels that is, a red pixel R, a white pixel W, a green pixel G, and a blue pixel B
  • the reference voltage line RL is formed at the single unit pixel P'.
  • the data driving unit 200 transmits sensing data Sdata, which is sensed from the pixels P, to the timing control unit 400, and delivers compensated input image data DATA', which is received from the timing control unit 400, to the pixels P according to a data control signal DCS.
  • the gate driving unit 300 receives a gate control signal GCS from the timing control unit 400 to control switching of a transistor included in each of the pixels P.
  • the timing control unit 400 converts an input image RGB into input image data DATA, and also converts the input image data DATA into the compensated input image data DATA' based on final compensation data Cdata', which is received from the pixel compensation module 500.
  • the timing control unit 400 receives and stores the sensing data Sdata as degradation data Ddata, and transmits the degradation data Ddata to the pixel compensation module 500.
  • the pixel compensation module 500 converts the compensation data Cdata received from the timing control unit 400 into the final compensation data Cdata', which is corrected, to transmit the final compensation data Cdata' to the timing control unit 400.
  • the pixel compensation module 500 detects a degraded region on the display panel 100 and an adjacent degraded region thereon on the basis of the degradation data Ddata. Thereafter, the pixel compensation module 500 differently corrects compensation data for the degraded region from compensation data for the adjacent degraded region.
  • the pixel compensation module 500 receives the input image data DATA to generate an image characteristic constant.
  • the pixel compensation module 500 determines a minimum value of the final compensation data Cdata' of pixels included in the degraded region, or a maximum value of the final compensation data Cdata' of pixels included in the adjacent degraded region on the basis of the generated image characteristic constant.
  • FIG. 4 is a diagram illustrating configurations of a pixel P and the data driving unit 200 of the display device 1000 according to one embodiment of the present disclosure.
  • the pixel P may be configured to include a pixel driving circuit PDC and an organic light-emitting diode.
  • the pixel driving circuit PDC includes a scan transistor Tsc, a sensing transistor Tss, a driving transistor Tdr, and a storage capacitor Cst.
  • the pixel P may be driven in a driving mode for emitting light corresponding to a data voltage Vdata and a sensing mode for sensing electrical characteristics (that is, a threshold voltage and electron mobility) of the driving transistor Tdr according to control signals of the transistors Tsc, Tss, and Tdr, which are input through signal lines.
  • the data driving unit 200 converts compensated digital data DATA', which is received from the timing control unit 400 according to a data control signal DCS of the driving mode, into a data voltage Vdata and supplies the data voltage Vdata to a corresponding data line DL.
  • the data driving unit 200 converts the compensated digital data DATA' received from the timing control unit 400 into the data voltage Vdata using a digital-analog converter DAC.
  • the scan transistor Tsc is turned on in response to a first scan pulse SP1 to output the data voltage Vdata to the data line DL.
  • the sensing transistor Tss is turned on in response to a second scan pulse SP2 to supply a reference voltage Vref, which is supplied to a reference voltage line RL, to a second node n2 that is a source terminal of the driving transistor Tdr.
  • the storage capacitor Cst charges a differential voltage between voltages respectively supplied to a first node n1 and the second node n2 according to a switching of each of the scan transistor Tsc and the sensing transistor Tss.
  • the driving transistor Tdr is turned on according to the voltage charged at the storage capacitor Cst, and the scan transistor Tsc and the sensing transistor Tss are turned off in response to the first scan pulse SP1 and the second scan pulse SP2, respectively.
  • the driving transistor Tdr is turned on by means of the voltage of the storage capacitor Cst to supply a driving current Ioled to the organic light-emitting diode OLED.
  • the organic light-emitting diode OLED emits light by means of the driving current Ioled supplied from the driving transistor Tdr and discharges monochrome light having luminance corresponding to the driving current Ioled.
  • the scan transistor Tsc is turned off in response to the first scan pulse SP1.
  • the data voltage Vdata is not supplied to a gate terminal of the driving transistor Tdr.
  • the sensing transistor Tss is turned on in response to the second scan pulse SP2 to supply a sensing voltage Vsen to the data driving unit 200 through the reference voltage line RL. Thereafter, the sensing voltage Vsen is converted into sensing data Sdata through the data driving unit 200 and the sensing data Sdata is transmitted to the timing control unit 400.
  • a sensing circuit SC may include a pre-charging switch SW1 which is controlled in an ON or OFF state based on the data control signal DCS to supply the reference voltage Vref to a source terminal of the sensing transistor Tss, and a sampling switch SW2 which connects a connection between the sensing line SL and an analog-digital converter ADC or blocks the connection therebetween.
  • the data driving unit 200 may control the sampling switch SW2 in an ON state and input the sensing voltage Vsen, which is transmitted from the first to d /4 th sensing lines SL1 to SL( d /4), to the analog-digital converter ADC to convert the sensing voltage Vsen into a digital form, thereby generating the sensing data Sdata.
  • timing control unit 400 of FIG. 2 will be described with reference to FIG. 5 .
  • FIG. 5 is a diagram illustrating a configuration of the timing control unit 400 and a data flow between components of the timing control unit 400 according to one embodiment of the present disclosure.
  • the timing control unit 400 includes a signal control unit 410, a data conversion unit 420, a data compensation unit 430, a degradation data storing unit 440, and a compensation data generation unit 450.
  • the signal control unit 410 outputs a plurality of control signals GCS and DCS using synchronous signals SYNC that are input from the outside.
  • the plurality of control signals GCS and DCS include the gate control signal GCS and the data control signal DCS.
  • the data control signal DCS is a signal for controlling the data driving unit 200
  • the gate control signal GCS is a signal for controlling the gate driving unit 300.
  • the synchronous signals SYNC include one or more of a dot clock DCLK, data enable signal DE, a horizontal synchronous signal Hsync, and a vertical synchronous signal Vsync.
  • the data conversion unit 420 converts the image signal RGB received from the outside into the input image data DATA so as to input the input image data DATA to the data driving unit 200.
  • the data compensation unit 430 adds the final compensation data Cdata', which is generated from the compensation data generation unit 450 that will be described and is corrected through the pixel compensation module 500, to the input image data DATA, thereby generating the compensated input image data DATA'.
  • the degradation data storing unit 440 stores the sensing data Sdata, which is sensed per pixel P in the sensing mode, as the degradation data Ddata.
  • the degradation data storing unit 440 may store a cumulative amount of data per pixel, which is produced by accumulating the compensated input image data DATA' being input to the data driving unit 200 at every frame.
  • the compensation data generation unit 450 determines a luminance compensation value from a luminance curve according to a difference in value between a reference sensing data and the sensing data Sdata when data stored as the degradation data Ddata is the sensing data Sdata, and generates the compensation data Cdata.
  • the compensation data generation unit 450 determines a luminance compensation value from a look-up table with respect to a luminance value according to the pre-stored cumulative amount of data per pixel, and then generates the compensation data Cdata.
  • the compensation data generation unit 450 has been described to generate the compensation data Cdata only when the degradation data Ddata is the sensing data Sdata or the cumulative amount of data per pixel, any type of degradation data Ddata may be used when the degradation data Ddata is a numerical value representing a degree of degradation of a pixel in addition to the sensing data Sdata and the cumulative amount of data per pixel.
  • the pixel compensation module 500 according to one embodiment of the present disclosure will be described in detail with reference to FIG. 6 .
  • FIG. 6 is a diagram illustrating a configuration of the pixel compensation module 500 and a data flow between components of the pixel compensation module 500 according to the invention.
  • the pixel compensation module 500 includes a degraded region detection unit 510, a compensation gain determination unit 530, and a compensation data correction unit 540.
  • the pixel compensation module 500 may be configured to further include an image characteristic constant generation unit 520.
  • the degraded region detection unit 510 generates a degradation map MAP of the display panel 100 on the basis of the degradation data Ddata per each pixel, which is received from the timing control unit 400.
  • the degradation map MAP may be a numerical value map in which a coordinate of each pixel included in the display panel 100 and the degradation data Ddata are mapped to each other.
  • the degraded region detection unit 510 detects a degraded region with reference to the degradation data Ddata corresponding to each pixel included in the display panel 100.
  • the degraded region may be a region including pixels where luminance between the pixels adjacent to each other is abruptly varied.
  • a meaning of the degraded region detected by the degraded region detection unit 510 will be described with reference to FIG. 7 .
  • FIG. 7 is a graph illustrating luminance and degradation data of each of pixel sections having different degradation forms from each other.
  • both of a pixel section of a region AR1 and a pixel section of a region AR2 respectively have maximum luminance of L4 and minimum luminance of L3 so that the maximum luminance and the minimum luminance are the same.
  • the luminance at each of both ends of the region AR1 is abruptly varied, whereas the luminance at each of both ends of the region AR2 is gradually increased and decreased.
  • a user perceives only the pixel section of the region AR1 in which luminance is abruptly varied at both ends thereof, as image sticking of the regions AR1 and AR2 having the same maximum and minimum luminance. That is, when a luminance deviation between adjacent pixels is large, a corresponding region is easily perceived as image sticking by the user. In other words, when a variance of luminance is gradual while a luminance difference between maximum and minimum luminance of a specific pixel section is large, it may be difficult for the user to perceive image sticking.
  • Such a variance of luminance in a pixel is in proportion to degradation data of the pixel.
  • the degradation data is a numerical value representing a degree of degradation of a pixel and may be sensing data that is sensed at each pixel or a cumulative amount of data per each pixel.
  • a difference of degradation data between adjacent pixels is calculated based on the degradation data of pixels shown in FIG. 7 such that a pixel section, which is easily perceived as image sticking by the user, may be determined.
  • the degraded region detection unit 510 detects a degraded region with reference to the degradation data corresponding to each pixel included in a display panel.
  • the degraded region detection unit 510 will be described in detail.
  • the degraded region detection unit 510 determines whether each pixel is a degraded pixel with reference to the degradation data Ddata.
  • the degraded region detection unit 510 applies a detection mask to degradation data Ddata of pixels included in a preset detection region. Further, the degraded region detection unit 510 calculates a degradation deviation value from the degradation data Ddata to which the detection mask is applied, and detects a degraded region based on the calculated degradation deviation value.
  • the detection mask may be a structure of an arbitrary matrix form located on the degradation map.
  • the detection mask may be a square matrix form such as 3X3, 5X5, and 7X7, but it is not limited thereto.
  • the detection mask may be one among a prewitt mask, a sobel mask, a Roberts mask, and a Laplacian mask, but it is not limited thereto.
  • the degraded region detection unit 510 places the detection mask on the degradation map and operations each operator of the detection mask with degradation data Ddata, which corresponds to a position of each operator, on the degradation map to calculate a degradation deviation value.
  • the degradation deviation value is equal to or greater than a degradation deviation reference value
  • the degraded region detection unit 510 determines a pixel, which is located at a center of the detection mask, as a degraded pixel.
  • the degradation deviation reference value which is preset, may be a numerical value of criterion in determining whether a difference between degradation data of the pixel located at the center of the detection mask and a pixel adjacent to the pixel located at the center thereof is perceived as image sticking by the user.
  • the degraded region detection unit 510 determines whether a degraded pixel exists with respect to all pixels on the display panel 100 by moving the detection mask in a row direction and a column direction.
  • the degraded region detection unit 510 determines the adjacent degraded pixel as a degraded region when the adjacent degraded pixel has a value equal to or greater than a preset degraded region reference value.
  • FIG. 8 is a diagram for describing a degraded region detection of a degraded region detection unit 510 according to one embodiment.
  • the degraded region detection unit 510 may use an X-axis sobel mask and a Y-axis sobel mask as a detection mask, and it may calculate a degradation deviation value using the following Equation 1 when detecting a degraded region by setting a degradation deviation reference value and a degraded region reference value to 20 and 10, respectively.
  • I(i,j) is degradation data of a pixel
  • Sobelh(i, j) is an operator of the X-axis sobel mask
  • Eh is an operation value of the X-axis sobel mask
  • Sobelv(i, j) is an operator of the Y-axis sobel mask
  • Ev is an operation value of the Y-axis sobel mask
  • TP is the number of pixels of a sobel mask
  • SI is a degradation deviation value of a pixel located at a center of the sobel mask.
  • the degraded region detection unit 510 calculates a degradation deviation value by applying the sobel mask to degradation data of a pixel located at (2, 2), multiplies operators (1, 0, -1), (1, 0, -1), and (1, 0, -1) of the X-axis sobel mask and degradation data (10, 10, 10), (10, 10, 10), and (10, 10, 10) of pixels corresponding to a position of the X-axis sobel mask, and sums up the multiplication results, thereby calculating an operation value of the X-axis sobel mask as 0.
  • the degraded region detection unit 510 multiplies operators (1, 1, 1), (0, 0, 0), and (-1, -1, -1) of the Y-axis sobel mask and degradation data (10, 10, 10), (10, 10, 10), and (10, 10, 10) of pixels corresponding to a position of the Y-axis sobel mask, and sums up the multiplication results, thereby calculating an operation value of Y-axis sobel mask as 0.
  • the degraded region detection unit 510 divides a sum of an absolute value of the operation value of the X-axis sobel mask and an absolute value of the operation value of the Y-axis sobel mask by 9 of the number of pixels of the sobel mask, thereby calculating a degradation deviation value of the pixel located at (2, 2) as 0.
  • the degraded region detection unit 510 does not determine the pixel located at (2, 2) as a degraded pixel.
  • the degraded region detection unit 510 determines whether the pixel located at (2, 2) is a degraded pixel using the X-axis sobel mask and the Y-axis sobel mask, and moves the X-axis sobel mask and the Y-axis sobel mask to an X-axis and a Y-axis, respectively, thereby determining whether a degraded pixel exists with respect to all pixels.
  • FIG. 9 is a diagram illustrating a degraded region detected from the degraded region detection unit 510 according to one embodiment.
  • the degraded region detection unit 510 performs a process of determining whether a degraded pixel exists with respect to all pixels, thereby detecting pixels located at (3, 3 to 7), (4, 3 to 7), (5, 3), (5, 4), (5, 6), (5, 7), (6, 3 to 7), and (7, 3 to 7) as degraded pixels.
  • the degraded region detection unit 510 determines the adjacent degraded pixels as a degraded region AR1.
  • the degraded region detection unit 510 may determine that the corresponding pixel is also included in the degraded region AR1.
  • a conventional degraded region detection method detects a certain region, which is presumed to output a logo such as a specific character, a number, and a symbol for a long time, as a degraded region so that a degraded region is detected without reflecting an actual degradation degree of a pixel.
  • the degraded region detection unit 510 detects a degraded region with reference to degradation data of each of all pixels included in the display panel 110 so that a degraded region may be detected by accurately reflecting a degradation degree of each of all the pixels.
  • the image characteristic constant generation unit 520 generates an image characteristic constant, which represents a characteristic of an image that is to be displayed on the display panel 100, from the input image data DATA. More particularly, the image characteristic constant generation unit 520 analyzes the input image data DATA to generate the image characteristic constant.
  • the image characteristic constant includes one or more of a global motion constant f1, a local motion constant f2, a local average pixel level constant f3, a local chroma constant f4, and a local edge constant f5.
  • the global motion constant f1 is a constant with respect to a motion generated in an image due to a movement of a camera while the image is taken.
  • the local motion constant f2 is a constant with respect to a motion generated in an image due to a movement of an object in the image.
  • the local average pixel level constant f3 is a constant with respect to an average brightness obtained from some region of an image.
  • the local chroma constant f4 is a constant with respect to chroma obtained from some region of an image.
  • the local edge constant f5 is a constant with respect to sharpness obtained from resolution of an edge region of an image.
  • the above described image characteristic constant may be a constant that is used in the compensation data correction unit 540 for determining whether to correct compensation data. This will be described in detail below.
  • FIG. 10 is a diagram illustrating luminance, compensation data, and a compensation gain according to a degraded region AR1 and an adjacent degraded region AR2.
  • the pixel compensation module 500 sets a region within a first preset distance R 1 from a peripheral pixel of the degraded region AR1 as the adjacent degraded region AR2.
  • the pixel compensation module 500 sets a region within a second preset distance R 2 from a peripheral pixel of the degraded region AR1 as a first adjacent degraded region AR2-1.
  • the pixel compensation module 500 sets a region between a peripheral pixel of the first adjacent degraded region AR2-1 and a peripheral pixel of the adjacent degraded region AR2 as a second adjacent degraded region AR2-2.
  • the degraded region AR1 when the degraded region AR1 is detected by means of the degraded region detection unit 510, the first adjacent degraded region AR2-1 enclosing the surroundings of the degraded region AR1 with a width of the second preset distance R 2 is set, and the second adjacent degraded region AR2-2 having a width of a difference between the first preset distance R 1 and the second preset distance R 2 is set to enclose the first adjacent degraded region AR2-1.
  • the compensation gain determination unit 530 determines a first compensation gain G1 for correcting compensation data Cdata of pixels included in the degraded region AR1, and a second compensation gain G2 for correcting compensation data Cdata of pixels included in the adjacent degraded region AR2.
  • the compensation gain determination unit 530 determines the first compensation gain G1 so as to decrease a size of final compensation data Cdata' as moving from the peripheral pixel of the degraded region AR1 to a central pixel CP thereof.
  • the compensation gain determination unit 530 determines the first compensation gain G1 so as to make a size of final compensation data Cdata' of the peripheral pixel of the degraded region AR1 have a maximum value among sizes of final compensation data Cdata' of the pixels included in the degraded region AR1.
  • the compensation gain determination unit 530 determines the first compensation gain G1 so as to make a size of final compensation data Cdata' of the central pixel CP of the degraded region AR1 have a minimum value among the sizes of final compensation data Cdata' of the pixels included in the degraded region AR1.
  • the compensation gain determination unit 530 determines the second compensation gain G2 so as to increase sizes of final compensation data Cdata' of pixels included in the first adjacent degraded region AR2-1 as moving the peripheral pixel of the degraded region AR1 to the peripheral pixel of the first adjacent degraded region AR2-1.
  • the compensation gain determination unit 530 determines the second compensation gain G2 so as to decrease sizes of final compensation data Cdata' of pixels included in the second adjacent degraded region AR2-2 as moving from the peripheral pixel of the first adjacent degraded region AR2-1 to the peripheral pixel of the second adjacent degraded region AR2-2.
  • the minimum value of the final compensation data Cdata' of the pixels included in the degraded region AR1 and the maximum value of the final compensation data Cdata' of the pixels included in the adjacent degraded region AR2 may be preset by means of the compensation gain determination unit 530.
  • the compensation gain determination unit 530 adjusts the minimum value of the final compensation data Cdata' of the pixels included in the degraded region AR1 and the maximum value of the final compensation data Cdata' of the pixels included in the adjacent degraded region AR2 on the basis of a variance amount of the image characteristic constant.
  • the compensation gain determination unit 530 adjusts the minimum value of final compensation data Cdata' of the pixels included in the degraded region AR1 or the maximum value of the final compensation data Cdata' of the pixels included in the adjacent degraded region AR2 in proportion to a variance amount of one or more of the global motion constant f1, the local motion constant f2, the local average pixel level constant f3, the local chroma constant f4, and the local edge constant f5 included in the image characteristic constant.
  • the compensation gain determination unit 530 may increase the minimum value of final compensation data Cdata' of the pixels included in the degraded region AR1 or the maximum value of the final compensation data Cdata' of the pixels included in the adjacent degraded region AR2.
  • the compensation gain determination unit 530 may increase the minimum value of final compensation data Cdata' of the pixels included in the degraded region AR1 or the maximum value of the final compensation data Cdata' of the pixels included in the adjacent degraded region AR2 according to the increase of the added or multiplied value.
  • the user may not perceive an increase of one or more of luminance of a pixel and chroma of the image even when compensation data is increased to cause an increase of one or more of the luminance of the pixel and the chroma of the image.
  • the compensation gain determination unit 530 adjusts and increases the minimum value of final compensation data Cdata' of the pixels included in the degraded region AR1 or the maximum value of the final compensation data Cdata' of the pixels included in the adjacent degraded region AR2.
  • the luminance of the pixels included in the degraded region AR1 before the compensation is abruptly decreased and increased at a boundary between the degraded region AR1 and the first adjacent degraded region AR2-1.
  • the luminance of the pixels included in the degraded region AR1 after the compensation is gradually decreased at the boundary between the degraded region AR1 and the first adjacent degraded region AR2-1.
  • the size of the compensation data becomes small as moving toward the central pixel CP rather than the compensation of a uniform size is applied as in the conventional method.
  • the luminance of the pixels included in the adjacent degraded region AR2 after the compensation is gradually increased toward a maximum value as moving from the peripheral pixel of the degraded region AR1 to the peripheral pixel of the first adjacent degraded region AR2-1, and then is gradually decreased as moving from the peripheral pixel of the first adjacent degraded region AR2-1 to the peripheral pixel of the second adjacent degraded region AR2-2.
  • the boundary of the degraded region AR1 is blurred compared to that before the compensation so that it is difficult for the user to perceive the degraded region AR1 as degradation of an actual panel.
  • the size of the compensation data applied to the degraded region AR1 is smaller compared to the conventional method, leading to a slower degradation of the degraded region AR1.
  • the compensation gain determination unit 530 determines the first compensation gain G1 of the pixels included in the degraded region AR1 as 0.
  • compensation for only the adjacent degraded region AR2 may be performed instead of compensating for the degraded region AR1 when a degradation degree of the pixels included in the degraded region AR1 is less than a degradation degree according to the preset compensation reference value.
  • the degraded region AR1 when compensation for the degraded region AR1 is not performed even though the degradation degree of the pixels included in the degraded region AR1 is less than the degradation degree according to the preset compensation reference value, the degraded region AR1 may be perceived as a degraded region of the panel by the user.
  • the compensation for the adjacent degraded region AR2 is performed, which is not performed in the conventional method, so that it is difficult for the user to perceive the degraded region AR1 as the degraded region of the panel even when compensation for the degraded region AR1 is not performed.
  • the compensation data correction unit 540 corrects compensation data Cdata of the pixels included in the degraded region AR1 and compensation data Cdata of the pixels included in the adjacent degraded region AR2 using the first compensation gain G1 and the second compensation gain G2.
  • the compensation data correction unit 540 determines whether to correct the compensation data Cdata of the pixels included in the degraded region AR1 or the compensation data Cdata of the pixels included in the adjacent degraded region AR2 on the basis of the input image data. That is, the compensation data correction unit 540 determines whether the input image data is suitable for performing the compensation on the basis of the image characteristic constant.
  • the image characteristic constant includes one or more of the global motion constant f1, the local motion constant f2, the local average pixel level constant f3, the local chroma constant f4, and the local edge constant f5.
  • the compensation data correction unit 540 multiplies all the global motion constant f1, the local motion constant f2, the local average pixel level constant f3, the local chroma constant f4, and the local edge constant f5 with each other, and then compares the multiplication result with a preset correction determination reference value.
  • the compensation data correction unit 540 determines to correct the compensation data Cdata of the pixels included in the degraded region AR1 and the compensation data Cdata of the pixels included in the adjacent degraded region AR2.
  • the compensation data correction unit 540 determines not to correct the compensation data Cdata of the pixels included in the degraded region AR1 and the compensation data Cdata of the pixels included in the adjacent degraded region AR2.
  • the compensation data correction unit 540 performs a correction of the compensation data with respect to only an image having an image characteristic that is difficult to be perceived by the user even though luminance and chroma of a pixel are varied so that a correction of the compensation data may be efficiently performed by corresponding to an image characteristic.
  • FIG. 11 is a flow chart illustrating a sequence of a pixel compensation method according to one embodiment of the present disclosure.
  • whether correction for compensation data is performed is determined on the basis of an image characteristic constant and whether input image data is suitable for performing compensation in Operation S1.
  • Operation S1 when it is determined not to correct the compensation data because the input image data is not suitable for performing the compensation, whether the correction for the compensation data is periodically determined on the basis of the image characteristic constant.
  • a first compensation gain for correcting compensation data of pixels included in the degraded region, and a second compensation gain for correcting compensation data of pixels included in an adjacent degraded region are determined in Operation S3.
  • the first compensation gain is determined so as to decrease sizes of final compensation data of the pixels included in the degraded region as moving from a peripheral pixel of the degraded region to a central pixel thereof.
  • a size of final compensation data of the peripheral pixel of the degraded region may be a maximum value among the sizes of final compensation data of the pixels included in the degraded region.
  • a size of final compensation data of the central pixel of the degraded region may be a minimum value among the sizes of final compensation data of the pixels included in the degraded region.
  • the second compensation gain is determined so as to increase sizes of final compensation data of pixels included in a first adjacent degraded region as moving from the peripheral pixel of the degraded region to a peripheral pixel of the first adjacent degraded region.
  • the second compensation gain is determined so as to decrease sizes of final compensation data of pixels included in a second adjacent degraded region as moving from the peripheral pixel of the first adjacent degraded region to a peripheral pixel of the second adjacent degraded region.
  • a minimum value of the final compensation data of the pixels included in the degraded region or a maximum value of the final compensation data of the pixels included in the adjacent degraded region may be determined on the basis of an image characteristic constant.
  • the final compensation data of the pixels included in the degraded region is decreased and the final compensation data of the pixels included in the adjacent degraded region is increased so that a lowering of image quality due to degradation may be reduced or prevented, and also a degradation degree of the pixels included in the degraded region may be decreased, thereby extending the lifetime of a display device.
EP16206613.8A 2016-05-31 2016-12-23 Display device and method for compensating pixels of display device Active EP3252750B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160067027A KR102453215B1 (ko) 2016-05-31 2016-05-31 표시 장치 및 표시 장치의 화소 보상 모듈 및 방법

Publications (2)

Publication Number Publication Date
EP3252750A1 EP3252750A1 (en) 2017-12-06
EP3252750B1 true EP3252750B1 (en) 2022-10-12

Family

ID=57609751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16206613.8A Active EP3252750B1 (en) 2016-05-31 2016-12-23 Display device and method for compensating pixels of display device

Country Status (6)

Country Link
US (1) US10013920B2 (ko)
EP (1) EP3252750B1 (ko)
JP (1) JP6517183B2 (ko)
KR (1) KR102453215B1 (ko)
CN (1) CN107452327B (ko)
TW (1) TWI600323B (ko)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102578563B1 (ko) * 2016-07-28 2023-09-15 삼성전자주식회사 전자 장치 및 전자 장치에서의 동작 제어 방법
KR102597608B1 (ko) * 2016-09-30 2023-11-01 엘지디스플레이 주식회사 유기발광표시장치와 그의 구동방법
CN106531103B (zh) * 2016-12-23 2018-04-10 惠科股份有限公司 液晶显示器的驱动方法、装置及液晶显示器
US20190180679A1 (en) * 2017-12-12 2019-06-13 Google Llc Display calibration to minimize image retention
KR102521334B1 (ko) * 2017-12-26 2023-04-14 삼성전자주식회사 디스플레이의 열화를 보상하기 위한 전자 장치 및 그의 동작 방법
CN108520717B (zh) * 2018-04-17 2020-06-23 京东方科技集团股份有限公司 色度补偿方法及装置、显示装置
KR102502205B1 (ko) * 2018-04-27 2023-02-22 삼성디스플레이 주식회사 열화 보상 장치, 이를 포함하는 표시 장치 및 표시 장치의 영상 데이터 보상 방법
CN110473486B (zh) * 2018-05-10 2023-05-12 联咏科技股份有限公司 基于颜色感知亮度来控制显示装置的方法及电子装置
KR101928426B1 (ko) * 2018-06-28 2018-12-12 주식회사 사피엔반도체 표시장치 및 그의 휘도 제어 방법
CN109064996B (zh) * 2018-08-14 2022-01-07 Oppo广东移动通信有限公司 显示调节方法、装置、存储介质及电子设备
KR102552299B1 (ko) 2018-08-31 2023-07-10 삼성디스플레이 주식회사 잔상 보상부, 이를 포함하는 표시 장치, 및 표시 장치의 구동 방법
KR102530014B1 (ko) * 2018-09-04 2023-05-10 삼성디스플레이 주식회사 로고 제어부 및 로고 제어 방법
CN110447061B (zh) * 2019-04-22 2022-07-05 京东方科技集团股份有限公司 亮度补偿方法、亮度补偿装置、显示装置及存储介质
US11302261B2 (en) * 2019-06-27 2022-04-12 Samsung Display Co., Ltd. Display apparatus and method of driving display panel using the same
KR20210085301A (ko) * 2019-12-30 2021-07-08 엘지디스플레이 주식회사 표시 장치 및 표시 장치의 구동 방법
KR20210091859A (ko) 2020-01-14 2021-07-23 삼성디스플레이 주식회사 표시 장치 및 표시 장치의 열화 보상 방법
JP2021117360A (ja) * 2020-01-27 2021-08-10 深▲セン▼通鋭微電子技術有限公司 駆動回路及び表示装置
KR102650708B1 (ko) * 2020-03-20 2024-03-25 삼성디스플레이 주식회사 표시 장치 및 이의 구동 방법
CN111476731B (zh) * 2020-04-01 2023-06-27 Oppo广东移动通信有限公司 图像矫正方法、装置、存储介质及电子设备
US11288989B2 (en) * 2020-05-05 2022-03-29 Novatek Microelectronics Corp. Source driver for driving and sensing display panel and calibration method thereof
CN116635926A (zh) * 2020-12-29 2023-08-22 夏普株式会社 显示装置以及显示装置的驱动方法
KR20220154314A (ko) 2021-05-12 2022-11-22 삼성디스플레이 주식회사 표시 장치 및 표시 장치의 구동 방법
KR20230006659A (ko) * 2021-07-01 2023-01-11 삼성디스플레이 주식회사 표시 장치
KR20230055197A (ko) * 2021-10-18 2023-04-25 엘지디스플레이 주식회사 디스플레이 장치 및 디스플레이 구동 방법
KR20230064703A (ko) * 2021-11-03 2023-05-11 삼성디스플레이 주식회사 표시 장치
CN114446237A (zh) * 2021-12-30 2022-05-06 深圳市华星光电半导体显示技术有限公司 Oled面板显示补偿方法、装置、显示设备和存储介质

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3941698B2 (ja) * 2003-01-23 2007-07-04 ソニー株式会社 画素補正回路及び画素補正方法
JP2007286296A (ja) 2006-04-17 2007-11-01 Sony Corp メニュー画面表示制御装置、自発光表示装置及びプログラム
JP5680814B2 (ja) * 2007-11-29 2015-03-04 エルジー ディスプレイ カンパニー リミテッド 画像表示装置
JP5213554B2 (ja) * 2008-07-10 2013-06-19 キヤノン株式会社 表示装置及びその駆動方法
US8237750B2 (en) 2008-10-23 2012-08-07 Motorola Mobility, Inc. Method of correcting emissive display burn-in
TWI402803B (zh) * 2008-12-23 2013-07-21 Univ Nat Chiao Tung The pixel compensation circuit of the display device
TWI412000B (zh) * 2010-04-21 2013-10-11 Univ Nat Cheng Kung 畫素補償電路
KR101964458B1 (ko) * 2012-12-10 2019-04-02 엘지디스플레이 주식회사 유기발광 표시장치 및 그의 열화보상방법
US9355591B2 (en) * 2013-04-30 2016-05-31 Samsung Display Co., Ltd. Organic light emitting diode display and method for compensating for degradation of pixel luminance
KR102270460B1 (ko) 2014-09-19 2021-06-29 삼성디스플레이 주식회사 유기 발광 표시 장치 및 이의 열화 보상 방법
KR102342086B1 (ko) * 2014-11-26 2021-12-23 삼성디스플레이 주식회사 표시 장치 및 표시 장치의 열화 보상 방법

Also Published As

Publication number Publication date
US10013920B2 (en) 2018-07-03
JP2017215564A (ja) 2017-12-07
US20170345377A1 (en) 2017-11-30
KR20170136086A (ko) 2017-12-11
CN107452327B (zh) 2019-12-06
EP3252750A1 (en) 2017-12-06
JP6517183B2 (ja) 2019-05-22
CN107452327A (zh) 2017-12-08
TWI600323B (zh) 2017-09-21
KR102453215B1 (ko) 2022-10-11
TW201811017A (zh) 2018-03-16

Similar Documents

Publication Publication Date Title
EP3252750B1 (en) Display device and method for compensating pixels of display device
US9412304B2 (en) Display device and method for driving the same
US7978159B2 (en) Organic light emitting diode display device and driving method thereof
KR102111777B1 (ko) 영상 표시장치 및 그의 구동 방법
KR102034062B1 (ko) 유기 발광 다이오드 표시장치 및 그 구동방법
EP3098803B1 (en) Image processing method, image processing circuit, and organic light emitting diode display device using the same
KR102279374B1 (ko) 열화보상장치 및 방법, 이를 포함하는 표시장치
KR102373691B1 (ko) 유기발광다이오드 표시장치 및 그의 화질 보상방법
CN108109585A (zh) 有机发光显示装置及其驱动方法
CN107851417B (zh) 显示控制装置和显示控制方法
KR102052751B1 (ko) 유기발광다이오드 표시장치의 구동트랜지스터 특성 검출방법
JP2010048939A (ja) 表示装置、表示制御装置、および表示制御方法、並びにプログラム
KR102290687B1 (ko) 타이밍제어부, 이를 포함하는 유기발광표시장치 및 이의 열화보상방법
US20140300592A1 (en) Display device and method of driving the same
US20190189050A1 (en) Display device and driving method thereof
KR20170021678A (ko) 표시장치 및 그의 데이터 보상방법
KR20170062572A (ko) 표시 장치 및 그 구동 방법
KR102279373B1 (ko) 열화보상장치 및 보상방법, 이를 포함하는 표시장치
KR20170073771A (ko) 유기발광표시패널, 유기발광표시장치 및 유기발광표시장치의 구동 방법
KR102597751B1 (ko) 멀티비젼 시스템 및 그 구동 방법
KR101895996B1 (ko) 유기전계발광 표시장치 및 그의 구동방법
KR102468139B1 (ko) 비디오 월 장치 및 그의 구동방법
JP2005308775A (ja) 表示装置及び表示装置付き電気機器
KR20170003210A (ko) 유기발광표시장치 및 이의 동작방법
KR101936679B1 (ko) 유기발광표시장치 및 그 구동방법

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20161223

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20190918

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20220502

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602016075569

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1524653

Country of ref document: AT

Kind code of ref document: T

Effective date: 20221115

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20221012

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1524653

Country of ref document: AT

Kind code of ref document: T

Effective date: 20221012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230213

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230112

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230212

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230113

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602016075569

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20221231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20221223

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

26N No opposition filed

Effective date: 20230713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20221231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20221223

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20221231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20221231

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20231023

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231024

Year of fee payment: 8

Ref country code: DE

Payment date: 20231023

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20161223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221012